Flushing Heating Systems; Cleaning The Dirt Filter - Resol SBS 2000 Manuel Pour Le Technicien Habilité

7.
Î Close the drain valve (3) of the filling and flushing
unit while the filling pump is running.
Î Increase the system pressure. The system pressure
can be read from the manometer.
9.
Î Close the filling valve (5).
OFF
Î Switch off the filling pump.
Î Check the manometer to see whether the system
pressure decreases (approx. 15 minutes) and elimi-
nate leaks where necessary.
Î Reconnect the expansion vessel to the solar ther-
mal system.
Î Open the filling valve (5) and switch on the filling
pump.
Î Set the operating pressure of the solar thermal
system (approx. 0.5 bar higher than the inlet pres-
sure of the expansion vessel or the value recom-
mended by the manufacturer).
Î Switch off the filling pump.
Î Close the filling valve (5) and open the ball valve (4).
14
Î Slowly discharge the heat transfer fluid by means
of the drain valve (3) until the operating pressure
(see above) is set.
Î Remove the hoses of the filling and flushing station
and screw the caps onto the fill and drain valves
of the station.
Î Empty the contents of the hoses into the tank of
the filling and flushing station by carefully loosening
the union nuts.
Î Close the ball valves.
Î Put the non-return valves in flow and return in op-
erating position.
Î Manually start the solar thermal pump at maximum
speed (see controller manual) and let the fluid cir-
11.
culate for at least 15 minutes.
Î Bleed the solar thermal system several times until
the discharged fluid is free of gas bubbles.
%
Î Check the antifreeze ratio.
Î Drain the tank of the filling and flushing station.
4.2

Flushing heating systems

note
Adjust the operating pressure of system.
note
Depending on the size of the system, the
radiators can either be separately opened
and closed or all at once.
Î Connect the pressure hose of the flushing and fill-
ing station to the filling valve of the system.
Î Connect the flushing hose of the flushing and filling
station to the drain valve of the system.
Î Open the ball valves of the filling and flushing station.
Î Open the filling valve and drain valve of the system.
Î Switch on the filling pump.
Î Flush the system by means of the filling and flushing
station until the discharged solar fluid is free of gas
bubbles and dirt particles.
Î Switch off the filling pump.
Î Close the filling valve and drain valve of the system.
Î Close the ball valves of the filling and flushing station.
Î Disconnect the pressure hose and the flushing hose.
4.3

cleaning the dirt filter

The dirt filter at the pump intake must be checked for
grit at regular intervals. In order to remove and clean
the dirt filter, proceed as follows:
Î Drain and open the tank.
The dirt filter is clearly visible at the bottom of the
tank.
Î Unscrew and remove the dirt filter.
Î Clean the dirt filter thoroughly under running water.
Î If necessary, remove dirt particles from the bottom
of the tank with a soft cloth.
Î Reinstall the dirt filter.
dirt filter
Make sure the fluid is always above the MIN
mark in order to prevent air intake.